Basal Metabolic Rate

There is a minimum level of energy required to sustain the body's vital functions in the waking state. It is called the basal metabolic rate (BMR) or resting metabolic rate (RMR). The BMR can account for about 60-70% of the body's daily energy consumption. BMR goes to supporting the ongoing metabolic work of the body's cells, such activities as pumping blood around the body, digesting food, respiration, maintaining body temperature and for cells to grow.

Calculating your BMR

There are numerous equations that can be used to estimate resting metabolic rate, here is one of the commonly used equations.

Schofield Equation

Use the table below to find the equation for estimating BMR for the appropriate age and sex category, using weight in kilograms.

  Age (years) Equation for BMR (MJ/day)
Men

10-18

(0.074 x weight) + 2.754

18-30

(0.063 x weight) + 2.896

30-60

(0.048 x weight) + 3.653

> 60

(0.049 x weight) + 2.459

Women

10-18

(0.056 x weight) + 2.898

18-30

(0.062 x weight) + 2.036

30-60

(0.034 x weight) + 3.538

> 60

(0.038 x weight) + 2.755

reference: Warwick P.M. Predicting food energy requirements from estimates of energy expenditure. Australian Journal of Nutrition and Dietetics Vol 46, Suppl. 1989

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